"Ik begrijp niet wat je zegt, want je praat te snel."
Translation:I do not understand what you are saying, because you are speaking too fast.
This sentence gave me the whole sentence without me having to fill in a single one. I don't think only having to hit "Check" is the purpose of this. Is there any particular place where I should post the screenshot?
File a bug report: https://support.duolingo.com/hc/en-us/requests/new
And feel free to upload the screenshot somewhere and post the link here, so others can use that in their bug report.
Wouldn't "verstaan" fit here better than "begripjen"? The rest of the sentence indicates that the problem is about understanding the speech, not a concept. I've once read that "verstaan" is used in these cases.